create_pull_request_review

THE RISK

Medium Risk

Why create_pull_request_review needs a policy

This tool creates/adds review comments to pull requests, which is a reversible modification of data. It does not execute code, delete data irreversibly, or move money. It falls squarely into Write operations—creating new records (review objects) in a version control system.

From the tool's definition Tool name 'create_pull_request_review' and description 'Create a review on a pull request' indicate this creates new review data on a pull request, modifying the state of the PR by adding reviewer feedback.

Documented attack patterns abuse exactly the kind of access create_pull_request_review gives an agent:

POLICY

How to control create_pull_request_review

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP-Brave-Search, and nothing reaches the server without passing your rules. This is the rule we recommend for create_pull_request_review:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_pull_request_review": {
      "limits": [
        {
          "counter": "create_pull_request_review_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

create_pull_request_review stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register MCP-Brave-Search — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
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FAQ

Questions about create_pull_request_review

What does the create_pull_request_review tool do? +

Create a review on a pull request. It is categorised as a Write tool in the MCP-Brave-Search MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_pull_request_review? +

Register the MCP-Brave-Search MCP server in PolicyLayer and add a rule for create_pull_request_review: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches MCP-Brave-Search. Nothing to install.

What risk level is create_pull_request_review? +

create_pull_request_review is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_pull_request_review? +

Yes. Add a rate_limit block to the create_pull_request_review rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block create_pull_request_review completely? +

Set action: deny in the PolicyLayer policy for create_pull_request_review. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides create_pull_request_review? +

create_pull_request_review is provided by the MCP-Brave-Search MCP server (modelcontextprotocol/servers-archived). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP-Brave-Search tool call.

Start from MCP-Brave-Search, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →